火箭推进2023，Vol.49Issue(6)：31-37,7.
应用功率谱法进行电磁阀线圈松动非线性模态仿真
Nonlinear modal simulation of solenoid valve coil looseness using power spectrum method
廖云龙 1吴佩沛 1尤罡1
作者信息
- 1. 上海空间推进研究所,上海 201112||上海空间发动机工程技术研究中心,上海 201112
- 折叠
摘要
Abstract
A nonlinear modal simulation method that combines time-domain transient dynamics simula-tion with frequency-domain power spectrum analysis was proposed.The simulation process is as follows:first,the periodogram method and probability statistics are used to simulate the random test conditions in the time domain.Combine and verify,obtain the fitting time domain conditions and prove the effective-ness,then use them as input conditions to conduct the transient dynamics simulation of the valve struc-ture,perform the power spectrum conversion on the time domain acceleration result curve,and finally ob-tain the structural nonlinear modal frequency through the power spectrum analysis.Different from the tra-ditional linear eigenvalue modal simulation principle,the nonlinear modal simulation method completes the nonlinear modal analysis through multiple processes of frequency domain power spectrum conditions-time domain fitting-time domain simulation-frequency domain analysis.The nonlinear effects of contact are introduced in the time domain simulation step.The thread loosening model of a certain solenoid valve coil uses conservative boundaries for linear modal simulation,and the deviation between simulation results and experimental results is 8.96％.After the friction coefficient calibration,the nonlinear modal frequen-cy simulation results and experimental deviation considering the nonlinear influence of contact are 0.69％.The result is better than linear simulation results.关键词
非线性模态/功率谱密度/随机振动/瞬态动力学Key words
nonlinear mode/power spectral density/random vibration/transient dynamics分类
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廖云龙,吴佩沛,尤罡..应用功率谱法进行电磁阀线圈松动非线性模态仿真[J].火箭推进,2023,49(6):31-37,7.
